- 2 years ago


Slack has emerged from beta today and hopes to give email a run for its money.

The latest project by serial entrepreneur Stuart Butterfield, who launched Flickr (acquired by Yahoo in 2005), Tiny Speck, and Glitch (a game that shut down) out of Vancouver, Slack aggregates messages and files from a bunch of sources—Twitter, DropBox, Mail Chimp, etc.—and integrates them into a customizable communications stream.

“Imagine all your team communication in one place, instantly searchable, available wherever you go,” the startup says. “That’s Slack.”

Slack, which was developed by Tiny Speck started in beta last August. It will now sell its service, described as “team communication for the 21st century,” through a tiered pricing model.

The startup currently has roughly 16,000 daily active users across 1,500 “teams,” or groups of people using the communications platform together. Weekly, these users are sending more than 2.5 million messages.

Already Slack has some recognizable customers, including Square, a product with Twitter cofounder Jack Dorsey behind it. Tiny Speck has solid Silicon Valley funding behind it, including investments from Andreessen Horowitz and Accel Partners.